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Root/branches/cparm/i386/modules/GUI/graphic_utils.c

1␊
2/* Graphic utility functions and data types␊
3 * Prashant Vaibhav (C) 12/12/2008␊
4 * Chameleon␊
5 */␊
6#include "libsaio.h"␊
7#include "bootstruct.h"␊
8#include "graphic_utils.h"␊
9#include "appleClut8.h"␊
10#include "vbe.h"␊
11#include "gui.h"␊
12␊
13#define VIDEO(x) (bootArgs->Video.v_ ## x)␊
14␊
15#define MIN(x, y) ((x) < (y) ? (x) : (y))␊
16static unsigned long lookUpCLUTIndex( unsigned char index,␊
17 unsigned char depth );␊
18␊
19static int␊
20setVESATextMode( unsigned short cols,␊
21␉␉␉␉unsigned short rows,␊
22␉␉␉␉unsigned char bitsPerPixel );␊
23␊
24static void setupPalette( VBEPalette * p, const unsigned char * g );␊
25static unsigned long lookUpCLUTIndex( unsigned char index,␊
26 unsigned char depth );␊
27static unsigned short␊
28getVESAModeWithProperties( unsigned short width,␊
29 unsigned short height,␊
30 unsigned char bitsPerPixel,␊
31 unsigned short attributesSet,␊
32 unsigned short attributesClear,␊
33 VBEModeInfoBlock * outModeInfo,␊
34 unsigned short * vesaVersion );␊
35//==========================================================================␊
36// LookUpCLUTIndex␊
37␊
38static unsigned long lookUpCLUTIndex( unsigned char index,␊
39 unsigned char depth )␊
40{␊
41 long result, red, green, blue;␊
42␉␊
43 red = appleClut8[index * 3 + 0];␊
44 green = appleClut8[index * 3 + 1];␊
45 blue = appleClut8[index * 3 + 2];␊
46␉␊
47 switch (depth) {␊
48 case 16 :␊
49 result = ((red & 0xF8) << 7) | ␊
50␉␉␉((green & 0xF8) << 2) |␊
51␉␉␉((blue & 0xF8) >> 3);␊
52 result |= (result << 16);␊
53 break;␊
54␉␉␉␊
55 case 32 :␊
56 result = (red << 16) | (green << 8) | blue;␊
57 break;␊
58␉␉␉␊
59 default :␊
60 result = index | (index << 8);␊
61 result |= (result << 16);␊
62 break;␊
63 }␊
64␉␊
65 return result;␊
66}␊
67␊
68int␊
69convertImage( unsigned short width,␊
70␉␉␉ unsigned short height,␊
71␉␉␉ const unsigned char *imageData,␊
72␉␉␉ unsigned char **newImageData )␊
73{␊
74 int cnt;␊
75 unsigned char *img = 0;␊
76 unsigned short *img16;␊
77 unsigned long *img32;␊
78␉␊
79 switch ( VIDEO(depth) ) {␊
80␉␉case 16 :␊
81␉␉␉img16 = malloc(width * height * 2);␊
82␉␉␉if ( !img16 ) break;␊
83␉␉␉for (cnt = 0; cnt < (width * height); cnt++)␊
84␉␉␉␉img16[cnt] = lookUpCLUTIndex(imageData[cnt], 16);␊
85␉␉␉img = (unsigned char *)img16;␊
86␉␉␉break;␊
87␉␉␉␊
88␉␉case 32 :␊
89␉␉␉img32 = malloc(width * height * 4);␊
90␉␉␉if ( !img32 ) break;␊
91␉␉␉for (cnt = 0; cnt < (width * height); cnt++)␊
92␉␉␉␉img32[cnt] = lookUpCLUTIndex(imageData[cnt], 32);␊
93␉␉␉img = (unsigned char *)img32;␊
94␉␉␉break;␊
95␉␉␉␊
96␉␉default :␊
97␉␉␉img = malloc(width * height);␊
98␉␉␉bcopy(imageData, img, width * height);␊
99␉␉␉break;␊
100 }␊
101 *newImageData = img;␊
102 return 0;␊
103}␊
104␊
105//==========================================================================␊
106// drawDataRectangle␊
107␊
108void drawDataRectangle( unsigned short x,␊
109␉␉␉␉␉ unsigned short y,␊
110␉␉␉␉␉ unsigned short width,␊
111␉␉␉␉␉ unsigned short height,␊
112␉␉␉␉␉ unsigned char * data )␊
113{␊
114 unsigned short drawWidth;␊
115 long pixelBytes = VIDEO(depth) / 8;␊
116 unsigned char * vram = (unsigned char *) VIDEO(baseAddr) +␊
117␉VIDEO(rowBytes) * y + pixelBytes * x;␊
118␉␊
119 drawWidth = MIN(width, VIDEO(width) - x);␊
120 height = MIN(height, VIDEO(height) - y);␊
121 while ( height-- ) {␊
122 bcopy( data, vram, drawWidth * pixelBytes );␊
123 vram += VIDEO(rowBytes);␊
124 data += width * pixelBytes;␊
125 }␊
126}␊
127␊
128//==========================================================================␊
129//␊
130void ␊
131printVBEModeInfo(void)␊
132{␊
133 VBEInfoBlock vbeInfo;␊
134 unsigned short * modePtr;␊
135 VBEModeInfoBlock modeInfo;␊
136 int err;␊
137 int line;␊
138␉␊
139 ␉//bzero( &vbeInfo, sizeof(vbeInfo) );␊
140 bzero( &vbeInfo, sizeof(VBEInfoBlock) );␊
141␊
142 strcpy( (char*)&vbeInfo, "VBE2" );␊
143 err = getVBEInfo( &vbeInfo );␊
144 if ( err != errSuccess )␊
145 return;␊
146␉␊
147 line = 0;␊
148␉␊
149 // Activate and clear page 1␊
150 setActiveDisplayPage(1);␊
151 clearScreenRows(0, 24);␊
152 setCursorPosition( 0, 0, 1 );␊
153␉␊
154␉printf("Video modes supported:\n", VBEDecodeFP(const char *, vbeInfo.OEMStringPtr));␊
155␉␊
156␉// Loop through the mode list, and find the matching mode.␊
157␉␊
158 for ( modePtr = VBEDecodeFP( unsigned short *, vbeInfo.VideoModePtr );␊
159␉␉ *modePtr != modeEndOfList; modePtr++ )␊
160 {␊
161 // Get mode information.␊
162␉␉␊
163 //bzero( &modeInfo, sizeof(modeInfo) );␊
164 bzero( &modeInfo, sizeof(VBEModeInfoBlock) );␊
165 ␊
166 err = getVBEModeInfo( *modePtr, &modeInfo );␊
167 if ( err != errSuccess )␊
168 {␊
169 continue;␊
170 }␊
171␉␉␊
172 printf("Mode %x: %dx%dx%d mm:%d attr:%x\n",␊
173 *modePtr, modeInfo.XResolution, modeInfo.YResolution,␊
174 modeInfo.BitsPerPixel, modeInfo.MemoryModel,␊
175 modeInfo.ModeAttributes);␊
176␉␉␊
177 if (line++ >= 20) {␊
178 pause();␊
179 line = 0;␊
180 clearScreenRows(0, 24);␊
181 setCursorPosition( 0, 0, 1 );␊
182 }␊
183 } ␊
184 if (line != 0) {␊
185 pause();␊
186 }␊
187 setActiveDisplayPage(0);␊
188}␊
189␊
190␊
191␊
192char *getVBEModeInfoString(void)␊
193{␊
194␉VBEInfoBlock vbeInfo;␊
195 unsigned short * modePtr;␊
196 VBEModeInfoBlock modeInfo;␊
197 int err;␊
198␉␊
199 ␉//bzero( &vbeInfo, sizeof(vbeInfo) );␊
200 bzero( &vbeInfo, sizeof(VBEInfoBlock) );␊
201␊
202 strcpy( (char*)&vbeInfo, "VBE2" );␊
203 err = getVBEInfo( &vbeInfo );␊
204 if ( err != errSuccess )␊
205 return 0;␊
206␉␊
207␉char *buff=malloc(sizeof(char)*3072);␊
208␉if(!buff) return 0;␊
209␉␊
210␉// Loop through the mode list, and find the matching mode.␊
211 for ( modePtr = VBEDecodeFP( unsigned short *, vbeInfo.VideoModePtr );␊
212␉␉ *modePtr != modeEndOfList; modePtr++ )␊
213 {␊
214 // Get mode information.␊
215␉␉␊
216 //bzero( &modeInfo, sizeof(modeInfo) );␊
217 bzero( &modeInfo, sizeof(VBEModeInfoBlock) );␊
218␊
219 err = getVBEModeInfo( *modePtr, &modeInfo );␊
220 if ( err != errSuccess )␊
221 {␊
222 continue;␊
223 }␊
224␉␉␊
225 sprintf(buff+strlen(buff), "Mode %x: %dx%dx%d mm:%d attr:%x\n",␊
226␉␉␉␉*modePtr, modeInfo.XResolution, modeInfo.YResolution,␊
227␉␉␉␉modeInfo.BitsPerPixel, modeInfo.MemoryModel,␊
228␉␉␉␉modeInfo.ModeAttributes);␊
229␉␉␊
230 } ␊
231␉return buff;␊
232}␊
233␊
234␊
235void blendImage(uint16_t x, uint16_t y, uint16_t width, uint16_t height,␊
236␉␉␉␉uint8_t *data)␊
237{␊
238 uint16_t drawWidth;␊
239 uint8_t *vram = (uint8_t *) VIDEO(baseAddr) + VIDEO(rowBytes) * y + 4 * x;␊
240␉␊
241 drawWidth = MIN(width, VIDEO(width) - x);␊
242 height = MIN(height, VIDEO(height) - y);␊
243 while (height--) {␊
244␉␉switch (VIDEO (depth))␊
245␉␉{␊
246␉␉␉case 32: /* Optimized version*/␊
247␉␉␉{␊
248␉␉␉␉uint32_t s; uint32_t* d; // Source (img) and destination (bkgd) pixels␊
249␉␉␉␉uint32_t a; // Alpha␊
250␉␉␉␉uint32_t dstrb, dstg, srcrb, srcg, drb, dg, rb, g, tempB; // Intermediate variables␊
251␉␉␉␉uint16_t pos;␊
252␉␉␉␉␊
253␉␉␉␉for (pos = 0; pos < drawWidth * 4; pos += 4) {␊
254␉␉␉␉␉// Fast pseudo-vector alpha blending, adapted from: http://www.stereopsis.com/doubleblend.html␊
255␉␉␉␉␉s = *((uint32_t*) (data + pos));␊
256␉␉␉␉␉d = (uint32_t*) (vram + pos);␊
257␉␉␉␉␉␊
258␉␉␉␉␉// Flip B and R in source␊
259␉␉␉␉␉// TODO: use XCHG and inline assembly to do this in a faster, saner way␊
260␉␉␉␉␉tempB = (s & 0xFF0000); // save B␊
261␉␉␉␉␉s = (s & 0xFF00FFFF) | ((s & 0xFF) << 16); // put R in B␊
262␉␉␉␉␉s = (s & 0xFFFFFF00) | (tempB >> 16); // put B in R␊
263␉␉␉␉␉␊
264␉␉␉␉␉a = (s >> 24) + 1;␊
265␉␉␉␉␉␊
266␉␉␉␉␉dstrb = *d & 0xFF00FF; dstg = *d & 0xFF00;␊
267␉␉␉␉␉srcrb = s & 0xFF00FF; srcg = s & 0xFF00;␊
268␉␉␉␉␉␊
269␉␉␉␉␉drb = srcrb - dstrb;␊
270␉␉␉␉␉dg = srcg - dstg;␊
271␉␉␉␉␉drb *= a; dg *= a;␊
272␉␉␉␉␉drb >>= 8; dg >>= 8;␊
273␉␉␉␉␉␊
274␉␉␉␉␉rb = (drb + dstrb) & 0xFF00FF;␊
275␉␉␉␉␉g = (dg + dstg) & 0xFF00;␊
276␉␉␉␉␉␊
277␉␉␉␉␉*d = rb | g;␊
278␉␉␉␉}␊
279␉␉␉}␊
280␉␉␉␉break;␊
281␉␉␉␉␊
282␉␉␉default: /*Universal version*/␊
283␉␉␉{␊
284␉␉␉␉uint32_t s; ␊
285␉␉␉␉uint32_t a; // Alpha␊
286␉␉␉␉uint32_t dr, dg, db, sr, sg, sb; // Intermediate variables␊
287␉␉␉␉uint16_t pos;␊
288␉␉␉␉int bpp = (VIDEO (depth) + 7)/8;␊
289␉␉␉␉␊
290␉␉␉␉for (pos = 0; pos < drawWidth; pos ++) {␊
291␉␉␉␉␉// Fast pseudo-vector alpha blending, adapted from: http://www.stereopsis.com/doubleblend.html␊
292␉␉␉␉␉s = *((uint32_t*) (data + 4*pos));␊
293␉␉␉␉␉␊
294␉␉␉␉␉sb = (s & 0xFF0000) >> 16;␊
295␉␉␉␉␉sg = (s & 0xFF00) >> 8;␊
296␉␉␉␉␉sr = (s & 0xFF);␊
297␉␉␉␉␉␊
298␉␉␉␉␉a = (s >> 24) + 1;␊
299␉␉␉␉␉␊
300␉␉␉␉␉switch (VIDEO (depth))␊
301␉␉␉␉␉{␊
302␉␉␉␉␉␉case 24:␊
303␉␉␉␉␉␉␉db = ((*(uint32_t *)(vram + bpp*pos))&0xff);␊
304␉␉␉␉␉␉␉dg = ((*(uint32_t *)(vram + bpp*pos))&0xff00)>>8;␊
305␉␉␉␉␉␉␉dr = ((*(uint32_t *)(vram + bpp*pos))&0xff0000)>>16;␊
306␉␉␉␉␉␉␉break;␊
307␉␉␉␉␉␉case 16://16-bit seems to be 15-bit␊
308␉␉␉␉␉␉␉/*␉␉␉␉␉␉␉db = ((*(uint16_t *)(vram + bpp*pos))&0x1f)<<3;␊
309␉␉␉␉␉␉␉ dg = ((*(uint16_t *)(vram + bpp*pos))&0x07e0)>>3;␊
310␉␉␉␉␉␉␉ dr = ((*(uint16_t *)(vram + bpp*pos))&0xf800)>>8;␊
311␉␉␉␉␉␉␉ break;␉␉␉␉␉␉␉*/␊
312␉␉␉␉␉␉case 15:␊
313␉␉␉␉␉␉␉db = ((*(uint16_t *)(vram + bpp*pos))&0x1f)<<3;␊
314␉␉␉␉␉␉␉dg = ((*(uint16_t *)(vram + bpp*pos))&0x03e0)>>2;␊
315␉␉␉␉␉␉␉dr = ((*(uint16_t *)(vram + bpp*pos))&0x7c00)>>7;␊
316␉␉␉␉␉␉␉break;␉␉␊
317␉␉␉␉␉␉default:␊
318␉␉␉␉␉␉␉return;␊
319␉␉␉␉␉}␊
320␉␉␉␉␉␊
321␉␉␉␉␉dr = (((sr - dr) * a) >> 8) + dr;␊
322␉␉␉␉␉dg = (((sg - dg) * a) >> 8) + dg;␊
323␉␉␉␉␉db = (((sb - db) * a) >> 8) + db;␊
324␉␉␉␉␉switch (VIDEO (depth))␊
325␉␉␉␉␉{␊
326␉␉␉␉␉␉case 24:␊
327␉␉␉␉␉␉␉*(uint32_t *)(vram + bpp*pos) = (*(uint32_t *)(vram + bpp*pos) &0xff000000)␊
328␉␉␉␉␉␉␉| (db&0xff) | ((dg&0xff)<<8) | ((dr&0xff)<<16);␊
329␉␉␉␉␉␉␉break;␊
330␉␉␉␉␉␉case 16:␊
331␉␉␉␉␉␉␉//␉␉␉␉␉␉␉*(uint16_t *)(vram + bpp*pos) = ((db&0xf8)>>3) | ((dg&0xfc)<<3) | ((dr&0xf8)<<8);␊
332␉␉␉␉␉␉␉//␉␉␉␉␉␉␉break;␉␉␉␉␉␉␉␊
333␉␉␉␉␉␉case 15:␊
334␉␉␉␉␉␉␉*(uint16_t *)(vram + bpp*pos) = ((db&0xf8)>>3) | ((dg&0xf8)<<2) | ((dr&0xf8)<<7);␊
335␉␉␉␉␉␉␉break;␉␊
336␉␉␉␉␉␉default:␊
337␉␉␉␉␉␉␉break;␊
338␉␉␉␉␉}␊
339␉␉␉␉␉␊
340␉␉␉␉}␉␉␉␉␊
341␉␉␉}␊
342␉␉␉␉break;␊
343 }␊
344 vram += VIDEO(rowBytes);␊
345 data += width * 4;␊
346 }␊
347}␊
348␊
349void drawCheckerBoard(void)␊
350{␊
351 uint32_t *vram = (uint32_t *) VIDEO(baseAddr);␊
352 uint16_t x, y;␊
353 uint8_t color;␊
354␉␊
355 for (y = 0; y < VIDEO(height); y++, vram += VIDEO(width)) {␊
356 for (x = 0; x < VIDEO(width); x++) {␊
357 color = 204 + 51 * (((x / 8) % 2) == ((y / 8) % 2));␊
358 vram[x] = (color << 16) | (color << 8) | color;␊
359 }␊
360 }␊
361}␊
362␊
363//==========================================================================␊
364// getNumberArrayFromProperty␊
365␊
366int␊
367getNumberArrayFromProperty( const char * propKey,␊
368 unsigned long numbers[],␊
369 unsigned long maxArrayCount )␊
370{␊
371 char * propStr;␊
372 unsigned long count = 0;␊
373␉␊
374 propStr = newStringForKey( (char *) propKey , DEFAULT_BOOT_CONFIG );␊
375 if ( propStr )␊
376 {␊
377 char * delimiter = propStr;␊
378 char * p = propStr;␊
379␉␉␊
380 while ( count < maxArrayCount && *p != '\0' )␊
381 {␊
382 unsigned long val = strtoul( p, &delimiter, 10 );␊
383 if ( p != delimiter )␊
384 {␊
385 numbers[count++] = val;␊
386 p = delimiter;␊
387 }␊
388 while ( ( *p != '\0' ) && !isdigit(*p) )␊
389 p++;␊
390 }␊
391␉␉␊
392 free( propStr );␊
393 }␊
394␉␊
395 return count;␊
396}␊
397␊
398//==========================================================================␊
399// Simple decompressor for boot images encoded in RLE format.␊
400␊
401char * decodeRLE( const void * rleData, int rleBlocks, int outBytes )␊
402{␊
403 char *out, *cp;␊
404␉␊
405 struct RLEBlock {␊
406 unsigned char count;␊
407 unsigned char value;␊
408 } * bp = (struct RLEBlock *) rleData;␊
409␉␊
410 out = cp = malloc( outBytes );␊
411 if ( out == NULL ) return NULL;␊
412␉␊
413 while ( rleBlocks-- )␊
414 {␊
415 memset( cp, bp->value, bp->count );␊
416 cp += bp->count;␊
417 bp++;␊
418 }␊
419␉␊
420 return out;␊
421}␊
422␊
423static void * stosl(void * dst, long val, long len)␊
424{␊
425 asm volatile ( "rep; stosl"␊
426␉␉␉␉ : "=c" (len), "=D" (dst)␊
427␉␉␉␉ : "0" (len), "1" (dst), "a" (val)␊
428␉␉␉␉ : "memory" );␊
429␉␊
430 return dst;␊
431}␊
432␊
433void drawColorRectangle( unsigned short x,␊
434 unsigned short y,␊
435 unsigned short width,␊
436 unsigned short height,␊
437 unsigned char colorIndex )␊
438{␊
439 long pixelBytes;␊
440 long color = lookUpCLUTIndex( colorIndex, VIDEO(depth) );␊
441 char * vram;␊
442␉␊
443 pixelBytes = VIDEO(depth) / 8;␊
444 vram = (char *) VIDEO(baseAddr) +␊
445␉VIDEO(rowBytes) * y + pixelBytes * x;␊
446␉␊
447 width = MIN(width, VIDEO(width) - x);␊
448 height = MIN(height, VIDEO(height) - y);␊
449␉␊
450 while ( height-- )␊
451 {␊
452 int rem = ( pixelBytes * width ) % 4;␊
453 if ( rem ) bcopy( &color, vram, rem );␊
454 stosl( vram + rem, color, pixelBytes * width / 4 );␊
455 vram += VIDEO(rowBytes);␊
456 }␊
457}␊
458␊
459␊
460␊
461//==========================================================================␊
462// getVESAModeWithProperties␊
463//␊
464// Return the VESA mode that matches the properties specified.␊
465// If a mode is not found, then return the "best" available mode.␊
466␊
467static unsigned short␊
468getVESAModeWithProperties( unsigned short width,␊
469 unsigned short height,␊
470 unsigned char bitsPerPixel,␊
471 unsigned short attributesSet,␊
472 unsigned short attributesClear,␊
473 VBEModeInfoBlock * outModeInfo,␊
474 unsigned short * vesaVersion )␊
475{␊
476 VBEInfoBlock vbeInfo;␊
477 unsigned short * modePtr;␊
478 VBEModeInfoBlock modeInfo;␊
479 unsigned char modeBitsPerPixel;␊
480 unsigned short matchedMode = modeEndOfList;␊
481 int err;␊
482␉␊
483 // Clear output mode info.␊
484␉␊
485 //bzero( outModeInfo, sizeof(*outModeInfo) );␊
486␉bzero( outModeInfo, sizeof(VBEModeInfoBlock) );␊
487␉␊
488 // Get VBE controller info containing the list of supported modes.␊
489␉␊
490 //bzero( &vbeInfo, sizeof(vbeInfo) );␊
491 bzero( &vbeInfo, sizeof(VBEInfoBlock) );␊
492 ␊
493 strcpy( (char*)&vbeInfo, "VBE2" );␊
494 err = getVBEInfo( &vbeInfo );␊
495 if ( err != errSuccess )␊
496 {␊
497 return modeEndOfList;␊
498 }␊
499␉␊
500 // Report the VESA major/minor version number.␊
501␉␊
502 if (vesaVersion) *vesaVersion = vbeInfo.VESAVersion;␊
503␉␊
504 // Loop through the mode list, and find the matching mode.␊
505␉␊
506 for ( modePtr = VBEDecodeFP( unsigned short *, vbeInfo.VideoModePtr );␊
507␉␉ *modePtr != modeEndOfList; modePtr++ )␊
508 {␊
509 // Get mode information.␊
510␉␉␊
511 //bzero( &modeInfo, sizeof(modeInfo) );␊
512 bzero( &modeInfo, sizeof(VBEModeInfoBlock) );␊
513␉␉␊
514 err = getVBEModeInfo( *modePtr, &modeInfo );␊
515 if ( err != errSuccess )␊
516 {␊
517 continue;␊
518 }␊
519␉␉␊
520#if DEBUG␊
521 printf("Mode %x: %dx%dx%d mm:%d attr:%x\n",␊
522 *modePtr, modeInfo.XResolution, modeInfo.YResolution,␊
523 modeInfo.BitsPerPixel, modeInfo.MemoryModel,␊
524 modeInfo.ModeAttributes);␊
525#endif␊
526␉␉␊
527 // Filter out unwanted modes based on mode attributes.␊
528␉␉␊
529 if ( ( ( modeInfo.ModeAttributes & attributesSet ) != attributesSet )␊
530␉␉␉|| ( ( modeInfo.ModeAttributes & attributesClear ) != 0 ) )␊
531 {␊
532 continue;␊
533 }␊
534␉␉␊
535 // Pixel depth in bits.␊
536␉␉␊
537 modeBitsPerPixel = modeInfo.BitsPerPixel;␊
538␉␉␊
539 if ( ( modeBitsPerPixel == 4 ) && ( modeInfo.MemoryModel == 0 ) )␊
540 {␊
541 // Text mode, 16 colors.␊
542 }␊
543 else if ( ( modeBitsPerPixel == 8 ) && ( modeInfo.MemoryModel == 4 ) )␊
544 {␊
545 // Packed pixel, 256 colors.␊
546 }␊
547 else if ( ( ( modeBitsPerPixel == 16 ) || ( modeBitsPerPixel == 15 ) )␊
548␉␉␉␉ && ( modeInfo.MemoryModel == 6 )␊
549␉␉␉␉ && ( modeInfo.RedMaskSize == 5 )␊
550␉␉␉␉ && ( modeInfo.GreenMaskSize == 5 )␊
551␉␉␉␉ && ( modeInfo.BlueMaskSize == 5 ) )␊
552 {␊
553 // Direct color, 16 bpp (1:5:5:5).␊
554 modeInfo.BitsPerPixel = modeBitsPerPixel = 16;␊
555 }␊
556 else if ( ( modeBitsPerPixel == 32 )␊
557␉␉␉␉ && ( modeInfo.MemoryModel == 6 )␊
558␉␉␉␉ && ( modeInfo.RedMaskSize == 8 )␊
559␉␉␉␉ && ( modeInfo.GreenMaskSize == 8 )␊
560␉␉␉␉ && ( modeInfo.BlueMaskSize == 8 ) )␊
561 {␊
562 // Direct color, 32 bpp (8:8:8:8).␊
563 }␊
564 else␊
565 {␊
566 continue; // Not a supported mode.␊
567 }␊
568␉␉␊
569 // Modes larger than the specified dimensions are skipped.␊
570␉␉␊
571 if ( ( modeInfo.XResolution > width ) ||␊
572␉␉␉( modeInfo.YResolution > height ) )␊
573 {␊
574 continue;␊
575 }␊
576␉␉␊
577 // Perfect match, we're done looking.␊
578␉␉␊
579 if ( ( modeInfo.XResolution == width ) &&␊
580␉␉␉( modeInfo.YResolution == height ) &&␊
581␉␉␉( modeBitsPerPixel == bitsPerPixel ) )␊
582 {␊
583 matchedMode = *modePtr;␊
584 //bcopy( &modeInfo, outModeInfo, sizeof(modeInfo) ); ␊
585 bcopy( &modeInfo, outModeInfo, sizeof(VBEModeInfoBlock) );␊
586␉␉␉␊
587 break;␊
588 }␊
589␉␉␊
590 // Save the next "best" mode in case a perfect match is not found.␊
591␉␉␊
592 if ( modeInfo.XResolution == outModeInfo->XResolution &&␊
593␉␉␉modeInfo.YResolution == outModeInfo->YResolution &&␊
594␉␉␉modeBitsPerPixel <= outModeInfo->BitsPerPixel )␊
595 {␊
596 continue; // Saved mode has more depth.␊
597 }␊
598 if ( modeInfo.XResolution < outModeInfo->XResolution ||␊
599␉␉␉modeInfo.YResolution < outModeInfo->YResolution ||␊
600␉␉␉modeBitsPerPixel < outModeInfo->BitsPerPixel )␊
601 {␊
602 continue; // Saved mode has more resolution.␊
603 }␊
604␉␉␊
605 matchedMode = *modePtr;␊
606 bcopy( &modeInfo, outModeInfo, sizeof(VBEModeInfoBlock) );␊
607␉␉␊
608 }␊
609␉␊
610 return matchedMode;␊
611}␊
612␊
613//==========================================================================␊
614// setVESATextMode␊
615␊
616static int␊
617setVESATextMode( unsigned short cols,␊
618␉␉␉␉unsigned short rows,␊
619␉␉␉␉unsigned char bitsPerPixel )␊
620{␊
621 VBEModeInfoBlock minfo;␊
622 unsigned short mode = modeEndOfList;␊
623␉␊
624 if ( (cols != 80) || (rows != 25) ) // not 80x25 mode␊
625 {␊
626 mode = getVESAModeWithProperties( cols, rows, bitsPerPixel,␊
627 maColorModeBit |␊
628 maModeIsSupportedBit,␊
629 maGraphicsModeBit,␊
630 &minfo, NULL );␊
631 }␊
632␉␊
633 if ( ( mode == modeEndOfList ) || ( setVBEMode(mode, NULL) != errSuccess ) )␊
634 {␊
635 video_mode( 2 ); // VGA BIOS, 80x25 text mode.␊
636 minfo.XResolution = 80;␊
637 minfo.YResolution = 25;␊
638 }␊
639␉␊
640 // Update KernBootStruct using info provided by the selected␊
641 // VESA mode.␊
642␉␊
643 bootArgs->Video.v_display = VGA_TEXT_MODE;␊
644 bootArgs->Video.v_baseAddr = 0xb8000;␊
645 bootArgs->Video.v_width = minfo.XResolution;␊
646 bootArgs->Video.v_height = minfo.YResolution;␊
647 bootArgs->Video.v_depth = 8;␊
648 bootArgs->Video.v_rowBytes = 0x8000;␊
649␉␊
650 return errSuccess; // always return success␊
651}␊
652␊
653//==========================================================================␊
654// setVideoMode␊
655//␊
656// Set the video mode to VGA_TEXT_MODE or GRAPHICS_MODE.␊
657#if UNUSED␊
658void␊
659setVideoMode( int mode, int drawgraphics)␊
660#else␊
661void␊
662setVideoMode( int mode)␊
663#endif␊
664{␊
665 unsigned long params[4];␊
666 int count;␊
667 int err = errSuccess;␊
668␉␊
669 if ( mode == GRAPHICS_MODE )␊
670 {␊
671 ␉␉if ( (err=GUI_initGraphicsMode ()) == errSuccess ) {␊
672␉␉␉if (gVerboseMode) {␊
673␉␉␉␉// Tell the kernel to use text mode on a linear frame buffer display␊
674 setBootArgsVideoMode(FB_TEXT_MODE);␊
675␊
676␉␉␉} else {␊
677 setBootArgsVideoMode(GRAPHICS_MODE);␊
678␊
679␉␉␉}␊
680␉␉}␊
681 }␊
682␉␊
683 if ( (mode == VGA_TEXT_MODE) || (err != errSuccess) )␊
684 {␊
685 count = getNumberArrayFromProperty( kTextModeKey, params, 2 );␊
686 if ( count < 2 )␊
687 {␊
688 params[0] = 80; // Default text mode is 80x25.␊
689 params[1] = 25;␊
690 }␊
691␉␉␊
692␉␉setVESATextMode( params[0], params[1], 4 );␊
693 setBootArgsVideoMode(VGA_TEXT_MODE);␊
694 }␊
695␊
696}␊
697␊
698//==========================================================================␊
699// setupPalette␊
700␊
701static void setupPalette( VBEPalette * p, const unsigned char * g )␊
702{␊
703 int i;␊
704 unsigned char * source = (unsigned char *) g;␊
705␉␊
706 for (i = 0; i < 256; i++)␊
707 {␊
708 (*p)[i] = 0;␊
709 (*p)[i] |= ((unsigned long)((*source++) >> 2)) << 16; // Red␊
710 (*p)[i] |= ((unsigned long)((*source++) >> 2)) << 8; // Green␊
711 (*p)[i] |= ((unsigned long)((*source++) >> 2)); // Blue␊
712␉␉␊
713 }␊
714}␊
715␊
716␊
717//==========================================================================␊
718// setVESAGraphicsMode␊
719#if UNUSED␊
720int setVESAGraphicsMode( unsigned short width, unsigned short height, unsigned char bitsPerPixel, unsigned short refreshRate )␊
721#else␊
722int setVESAGraphicsMode( unsigned short width, unsigned short height, unsigned char bitsPerPixel)␊
723#endif␊
724{␊
725 VBEModeInfoBlock minfo;␊
726 unsigned short mode;␊
727 unsigned short vesaVersion;␊
728 int err = errFuncNotSupported;␊
729␉␊
730 do {␊
731 mode = getVESAModeWithProperties( width, height, bitsPerPixel,␊
732␉␉␉␉␉␉␉␉␉␉ maColorModeBit |␊
733␉␉␉␉␉␉␉␉␉␉ maModeIsSupportedBit |␊
734␉␉␉␉␉␉␉␉␉␉ maGraphicsModeBit |␊
735␉␉␉␉␉␉␉␉␉␉ maLinearFrameBufferAvailBit,␊
736␉␉␉␉␉␉␉␉␉␉ 0,␊
737␉␉␉␉␉␉␉␉␉␉ &minfo, &vesaVersion );␊
738 if ( mode == modeEndOfList )␊
739 {␊
740 break;␊
741 }␊
742#if UNUSED␊
743␉␉//␊
744␉␉// FIXME : generateCRTCTiming() causes crash.␊
745␉␉//␊
746␉␉␊
747␉␉// if ( (vesaVersion >> 8) >= 3 && refreshRate >= 60 &&␊
748␉␉// (gBootMode & kBootModeSafe) == 0 )␊
749␉␉// {␊
750␉␉// VBECRTCInfoBlock timing;␊
751␉␉// ␊
752␉␉// // Generate CRTC timing for given refresh rate.␊
753␉␉// ␊
754␉␉// generateCRTCTiming( minfo.XResolution, minfo.YResolution,␊
755␉␉// refreshRate, kCRTCParamRefreshRate,␊
756␉␉// &timing );␊
757␉␉// ␊
758␉␉// // Find the actual pixel clock supported by the hardware.␊
759␉␉// ␊
760␉␉// getVBEPixelClock( mode, &timing.PixelClock );␊
761␉␉// ␊
762␉␉// // Re-compute CRTC timing based on actual pixel clock.␊
763␉␉// ␊
764␉␉// generateCRTCTiming( minfo.XResolution, minfo.YResolution,␊
765␉␉// timing.PixelClock, kCRTCParamPixelClock,␊
766␉␉// &timing );␊
767␉␉// ␊
768␉␉// // Set the video mode and use specified CRTC timing.␊
769␉␉// ␊
770␉␉// err = setVBEMode( mode | kLinearFrameBufferBit |␊
771␉␉// kCustomRefreshRateBit, &timing );␊
772␉␉// }␊
773␉␉// else␊
774␉␉// {␊
775␉␉// // Set the mode with default refresh rate.␊
776␉␉// ␊
777␉␉// err = setVBEMode( mode | kLinearFrameBufferBit, NULL );␊
778␉␉// }␊
779#endif␊
780 // Set the mode with default refresh rate.␊
781␉␉␊
782 err = setVBEMode( mode | kLinearFrameBufferBit, NULL );␊
783␉␉␊
784 if ( err != errSuccess )␊
785 {␊
786 break;␊
787 }␊
788␉␉␊
789 // Set 8-bit color palette.␊
790␉␉␊
791 if ( minfo.BitsPerPixel == 8 )␊
792 {␊
793 VBEPalette palette;␊
794 setupPalette( &palette, appleClut8 );␊
795 if ((err = setVBEPalette(palette)) != errSuccess)␊
796 {␊
797 break;␊
798 }␊
799 }␊
800␉␉␊
801 // Is this required for buggy Video BIOS implementations?␊
802 // On which adapter?␊
803␉␉␊
804 if ( minfo.BytesPerScanline == 0 )␊
805␉␉␉minfo.BytesPerScanline = ( minfo.XResolution *␊
806␉␉␉␉␉␉␉␉␉ minfo.BitsPerPixel ) >> 3;␊
807␉␉␊
808 // Update KernBootStruct using info provided by the selected␊
809 // VESA mode.␊
810␉␉␊
811 setBootArgsVideoMode(GRAPHICS_MODE);␊
812 ␊
813 bootArgs->Video.v_width = minfo.XResolution;␊
814 bootArgs->Video.v_height = minfo.YResolution;␊
815 bootArgs->Video.v_depth = minfo.BitsPerPixel;␊
816 bootArgs->Video.v_rowBytes = minfo.BytesPerScanline;␊
817 bootArgs->Video.v_baseAddr = VBEMakeUInt32(minfo.PhysBasePtr);␊
818␉␉␊
819 }␊
820 while ( 0 );␊
821␉␊
822 return err;␊
823}␊
824␊
825void getGraphicModeParams(unsigned long params[]) {␊
826␉␊
827␉params[3] = 0;␊
828␉␊
829␉VBEModeInfoBlock minfo;␊
830␉␊
831 unsigned short vesaVersion;␊
832 unsigned short mode = modeEndOfList;␊
833␉␊
834␉getNumberArrayFromProperty( kGraphicsModeKey, params, 4);␊
835␉␊
836␉mode = getVESAModeWithProperties( params[0], params[1], params[2],␊
837␉␉␉␉␉␉␉␉␉ maColorModeBit |␊
838␉␉␉␉␉␉␉␉␉ maModeIsSupportedBit |␊
839␉␉␉␉␉␉␉␉␉ maGraphicsModeBit |␊
840␉␉␉␉␉␉␉␉␉ maLinearFrameBufferAvailBit,␊
841␉␉␉␉␉␉␉␉␉ 0,␊
842␉␉␉␉␉␉␉␉␉ &minfo, &vesaVersion );␊
843␉␊
844␉params[0] = minfo.XResolution;␊
845␉params[1] = minfo.YResolution;␊
846␉params[2] = 32;␊
847}␊
848␊
849␊
850//==========================================================================␊
851// getVBEInfoString␊
852␊
853char *getVBEInfoString(void)␊
854{␊
855␉VBEInfoBlock vbeInfo;␊
856␉int err, small;␊
857␉char *buff = malloc(sizeof(char)*256);␊
858␉if(!buff) return 0;␊
859␉␊
860␉//bzero( &vbeInfo, sizeof(vbeInfo) );␊
861 bzero( &vbeInfo, sizeof(VBEInfoBlock) );␊
862␊
863␉strcpy( (char*)&vbeInfo, "VBE2" );␊
864␉err = getVBEInfo( &vbeInfo );␊
865␉if (err != errSuccess)␊
866␉␉return 0;␊
867␉␊
868␉if ( strncmp( (char *)vbeInfo.VESASignature, "VESA", 4 ) )␊
869␉␉return 0;␊
870␉␊
871␉small = (vbeInfo.TotalMemory < 16);␊
872␉␊
873␉sprintf(buff, "VESA v%d.%d %d%s (%s)\n",␊
874␉␉␉vbeInfo.VESAVersion >> 8,␊
875␉␉␉vbeInfo.VESAVersion & 0xf,␊
876␉␉␉small ? (vbeInfo.TotalMemory * 64) : (vbeInfo.TotalMemory / 16),␊
877␉␉␉small ? "KB" : "MB",␊
878␉␉␉VBEDecodeFP(const char *, vbeInfo.OEMStringPtr) );␊
879␉␊
880␉return buff;␊
881}␊
882␊
883void blend( const pixmap_t *blendThis, // Source image␊
884␉␉ pixmap_t *blendInto, // Dest image␊
885␉␉ const position_t position) // Where to place the source image␊
886{␊
887 uint16_t sx, sy, dx, dy;␊
888 uint32_t dstrb, dstag, srcrb, srcag, drb, dag, rb, ag, alpha;␊
889␉␊
890␉uint16_t width = (blendThis->width + position.x < blendInto->width) ? blendThis->width: blendInto->width-position.x;␊
891␉uint16_t height = (blendThis->height + position.y < blendInto->height) ? blendThis->height: blendInto->height-position.y;␊
892␉␊
893␉for (dy = position.y, sy = 0; sy < height; dy++, sy++) ␊
894␉{␊
895 for (dx = position.x, sx = 0; sx < width; dx++, sx++) ␊
896␉␉{␊
897 alpha = (pixel(blendThis, sx, sy).ch.a);␊
898␉␉␉␊
899␉␉␉/* Skip blending for fully transparent pixel */␊
900␉␉␉if (alpha == 0) continue;␊
901␉␉␉␊
902␉␉␉/* For fully opaque pixel, there is no need to interpolate */␊
903␉␉␉if (alpha == 255)␊
904␉␉␉{␊
905␉␉␉␉pixel(blendInto, dx, dy).value = pixel(blendThis, sx, sy).value;␊
906␉␉␉␉continue;␊
907␉␉␉}␊
908␉␉␉␊
909␉␉␉/* For semi-transparent pixels, do a full blend */␊
910␉␉␉//alpha++␊
911␉␉␉/* This is needed to spread the alpha over [0..256] instead of [0..255]␊
912␉␉␉ Boundary conditions were handled above */␊
913 dstrb = pixel(blendInto, dx, dy).value & 0xFF00FF;␊
914 dstag = (pixel(blendInto, dx, dy).value >> 8) & 0xFF00FF;␊
915 srcrb = pixel(blendThis, sx, sy).value & 0xFF00FF;␊
916 srcag = (pixel(blendThis, sx, sy).value >> 8) & 0xFF00FF;␊
917 drb = srcrb - dstrb;␊
918 dag = srcag - dstag;␊
919 drb *= alpha; dag *= alpha;␊
920 drb >>= 8; dag >>= 8;␊
921 rb = (drb + dstrb) & 0x00FF00FF;␊
922 ag = ((dag + dstag) << 8) & 0xFF00FF00;␊
923 pixel(blendInto, dx, dy).value = (rb | ag);␊
924 }␊
925 }␊
926}␊
927␊
928position_t centeredIn( const pixmap_t *background, const pixmap_t *toCenter )␊
929{␊
930 position_t centered;␊
931 centered.x = ( background->width - toCenter->width ) / 2;␊
932 centered.y = ( background->height - toCenter->height ) / 2;␊
933 return centered;␊
934}␊
935␊
936position_t centeredAt( const pixmap_t *pixmap, const position_t center )␊
937{␊
938 position_t topleft;␊
939 topleft.x = center.x - (pixmap->width / 2);␊
940 topleft.y = center.y - (pixmap->height / 2);␊
941 return topleft;␊
942}␊
943␊
944position_t pos(const uint16_t x, const uint16_t y) { position_t p; p.x = x; p.y = y; return p; }␊
945␊
946void flipRB(pixmap_t *p)␊
947{␊
948␉//if(testForQemu()) return;␊
949␉␊
950␉uint32_t x;␊
951 register uint8_t tempB;␊
952␉for (x = 0; x < (unsigned long)(p->height) * (p->width) ; x++) {␊
953␉␉tempB = (p->pixels[x]).ch.b;␊
954 (p->pixels[x]).ch.b = (p->pixels[x]).ch.r;␊
955 (p->pixels[x]).ch.r = tempB;␊
956␉}␊
957}␊
958

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